Orient, South Dakota has a Humid Continental Hot Summers With Year Around Precipitation climate (Köppen classification: Dfa). Average annual temperatures range from 0.4 °C (low) to 13.2 °C (high). Annual precipitation averages 550.2 Millimeters. Orient is located in USDA Plant Hardiness Zone 4b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Sep. 21 - Sep. 30.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -15.2 °C | -4.6 °C | 12.19 mm |
| February | -13.2 °C | -1.8 °C | 16.76 mm |
| March | -6.9 °C | 5.2 °C | 23.37 mm |
| April | -0.4 °C | 13.4 °C | 53.09 mm |
| May | 6.7 °C | 20.3 °C | 85.6 mm |
| June | 12.7 °C | 25.8 °C | 89.41 mm |
| July | 15.4 °C | 29.2 °C | 84.33 mm |
| August | 14.1 °C | 28.4 °C | 58.42 mm |
| September | 8.8 °C | 23.7 °C | 52.58 mm |
| October | 1.3 °C | 14.9 °C | 43.69 mm |
| November | -6.1 °C | 5.8 °C | 15.24 mm |
| December | -12.1 °C | -1.8 °C | 15.49 mm |
| Annual | 0.4 °C | 13.2 °C | 550.17 mm |
| Average First Frost Date | Sep. 21 - Sep. 30 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 4b : -31.7°C to -28.9°C |
| Plant Hardiness Zone - 2012 | Zone 4b : -31.7°C to -28.9°C |
| Current Drought Conditions | Abnormally Dry |
| Köppen Climate Classification | Dfa - Humid Continental Hot Summers With Year Around Precipitation |